The word insecure is so broad that I think OP needs to further define what he means. Insecure depending on what criteria? Financially, emotionally, ability, etc. And is being insecure in itself bad? I think insecurity has fueled a lot of accomplishment.

"For a man who wants to make a profession of good in all regards must come to ruin among so many who are not good. Hence it is necessary to a prince, if he wants to maintain himself, to learn to be able not to be good, and to use this and not use it according to necessity."
Niccolo Machiavelli

The word insecure is so broad that I think OP needs to further define what he means. Insecure depending on what criteria? Financially, emotionally, ability, etc. And is being insecure in itself bad? I think insecurity has fueled a lot of accomplishment.

You have to be the smartest INFJ I have ever met on an internet forum.

My INTPs tend to be much less neroticlly insecure than the ENTPs. They sort of just stare at me and then go back to whatever they were analyzing. This is a problem as they fail to communicate with one another and thus information does not make it across the gaps. They also seem less attached to the ideas they generate.

(Although one of my favorites did point out that I am like a bolt that is lefty-tighty rather than righty-tighty. )